title: Ultrasound-assisted fractionation of the lignocellulosic material.
abstract: In the present work the effectiveness of different lignocellulosic biomass fractionation processes based on ultrasounds technology was evaluated. Organosolv (acetic acid 60% v/v), alkaline (sodium hydroxide 7.5% w/w) and autohydrolysis treatments were applied at low temperature and the fractionation effectiveness was measured at different sonication conditions of the raw material. The obtained solid fractions were characterized using TAPPI standard methods, and the liquid fractions main components were quantified with the purpose of studying the effect that the treatment conditions had on the obtained by-products quality. Therefore, obtained lignin samples were characterized by ATR-IR spectroscopy and their thermal behaviour by TGA technique. The results showed that ultrasounds application improved the yield and selectivity of the studied processes and that the obtained lignin did not suffer significant modifications in its physicochemical properties.
authors.affiliation: Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa 1, 20018 Donostia - San Sebastián, Spain. araceli.garcia@ehu.es
authors.forename: Araceli
authors.initials: A
authors.lastname: García
authors.forename: María González
authors.initials: MG
authors.lastname: Alriols
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Llano-Ponte
authors.forename: Jalel
authors.initials: J
authors.lastname: Labidi
mesh_terms: D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry; D014465:Ultrasonics
chemical_list: C036909:lignocellulose; D012972:Sodium Hydroxide; D008031:Lignin